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-rw-r--r--xpcom/base/NSPRLogModulesParser.cpp66
1 files changed, 66 insertions, 0 deletions
diff --git a/xpcom/base/NSPRLogModulesParser.cpp b/xpcom/base/NSPRLogModulesParser.cpp
new file mode 100644
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+++ b/xpcom/base/NSPRLogModulesParser.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "NSPRLogModulesParser.h"
+
+#include "mozilla/Tokenizer.h"
+
+const char kDelimiters[] = ", ";
+const char kAdditionalWordChars[] = "_-.*";
+
+namespace mozilla {
+
+void NSPRLogModulesParser(
+ const char* aLogModules,
+ const std::function<void(const char*, LogLevel, int32_t)>& aCallback) {
+ if (!aLogModules) {
+ return;
+ }
+
+ Tokenizer parser(aLogModules, kDelimiters, kAdditionalWordChars);
+ nsAutoCString moduleName;
+
+ Tokenizer::Token rustModSep =
+ parser.AddCustomToken("::", Tokenizer::CASE_SENSITIVE);
+
+ auto readModuleName = [&](nsAutoCString& moduleName) -> bool {
+ moduleName.Truncate();
+ nsDependentCSubstring sub;
+ parser.Record();
+ // If the name doesn't include at least one word, we've reached the end.
+ if (!parser.ReadWord(sub)) {
+ return false;
+ }
+ // We will exit this loop if when any of the condition fails
+ while (parser.Check(rustModSep) && parser.ReadWord(sub)) {
+ }
+ // Claim will include characters of the last sucessfully read item
+ parser.Claim(moduleName, Tokenizer::INCLUDE_LAST);
+ return true;
+ };
+
+ // Format: LOG_MODULES="Foo:2,Bar, Baz:5,rust_crate::mod::file:5"
+ while (readModuleName(moduleName)) {
+ // Next should be :<level>, default to Error if not provided.
+ LogLevel logLevel = LogLevel::Error;
+ int32_t levelValue = 0;
+ if (parser.CheckChar(':')) {
+ // NB: If a level isn't provided after the ':' we assume the default
+ // Error level is desired. This differs from NSPR which will stop
+ // processing the log module string in this case.
+ if (parser.ReadSignedInteger(&levelValue)) {
+ logLevel = ToLogLevel(levelValue);
+ }
+ }
+
+ aCallback(moduleName.get(), logLevel, levelValue);
+
+ // Skip ahead to the next token.
+ parser.SkipWhites();
+ }
+}
+
+} // namespace mozilla